Great Plains ADC2220 Operator Manual - Manual (Page 73)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 69
2012-10-17 Table of Contents Index 167-073M
Refer to Figure 87
There are two shift handles
for each gearbox. One
has an indicator labelled A-E at the gearbox; the other
is labelled 1-5. These marking correspond to the settings
“A1” through “E5” in the charts.
Machine Damage Risk: To prevent gearbox damage, always
disengage the gearbox clutch (page 68) before shifting gears.
3. For the gearbox to be changed, move each handle
until the indicator settles into the detent at the letter
and number setting desired. If levers do not move
easily, use calibration crank to turn the metering
drive train slightly to relieve binding.
4. Ease the clutch handle back until the plunge pin
re-engages. If resistance is felt, use calibration crank
to turn metering drive slightly while engaging the
clutch. This aligns the gear teeth and prevents gear
damage.
Do not force the clutch handle into engagement.
Meter Calibration
The Seed Rate charts are based on cleaned untreated
seed of average size and test weight. Many factors affect
meter rates including foreign material, seed treatment,
seed size, field conditions, and test weight. The Fertilizer
Rate chart is based on a representative granular
fertilizer.
Great Plains recommends calibrating for the exact
materials you intend to apply. Calibration determines the
pounds per acre (or kg/ha) of the meter at the current
drive setting for your particular seed or fertilizer.
If applying different materials from each bulk hopper,
each must be calibrated separately. If applying the same
materials, calibrate each separately for best results.
Calibration Procedure and Example
1.
Set the meter drive system setting to the values
suggested in the Seed or Fertilizer Rate Chart. If you
have applied this material before, start with the
settings last used for it.
The right column contains an example
a
for the following
steps.
2. Make sure there is enough material in the hopper(s)
for at least one acre (or hectare) plus an extra 75 to
100 pounds. (35-45 kg).
a. In the example, several Shifter Lever settings correspond to the same rate. The middle settings (C3) have the least gear wear.
Figure 88
Gearbox Shifters
16215
3
4
3
4
Example: Hard Wheat, single hopper, 2 Stars
Target Seed Rate:
60 pounds per acre
The nearest chart rate is:
57.2 pounds per acre
which corresponds to initial drive settings of:
20T DRIVING Quick-Change Sprocket
30T DRIVEN Quick-Change Sprocket
54T DRIVING Meter Box Gear
17T DRIVEN Meter Box Gear
C3 Shifter Levers